Friction shoe construction for a pivoting window

ABSTRACT

A friction shoe construction for a pivoting type window or closure. The window includes a sash which is mounted for pivoting movement with respect to the frame. The central portions of the sash stiles are pivotally connected to the jambs of the frame by arms, while the ends of the sash stiles are pivotally connected to shoes which ride in guide tracks on the frame jambs. Each shoe is constructed of a flexible material and is provided with a central opening having converging side walls. A wedge block having complementary inclined sides is mounted within the opening. A stud is connected to the wedge block and by tightening down the stud, the wedge block is moved within the opening in the shoe to force the sides of the shoe outwardly into engagement with the guide track to increase the frictional resistance.

United States Patent Ringle, IH [451 Mar. 21, 1972 [541 FRICTION SHOECONSTRUCTION FOR FOREIGN PATENTS 0R APPLICATIONS A PIVOTING WINDOW595,765 4/1960 Canada ..49/25 I [72] Inventor: John Ringle, III, Wausau,Wis.

Primary Examiner-Dennis L. Taylor [73] Assignee. wzlsusau MetalsCorporation, Wausau, Anomey Andms Scealcs, Starke & Sawan [22] Filed:Jan. 26, 1970 57 ABSTRACT PP 5,865 A friction shoe construction for apivoting type window or closure. The window includes a sash which ismounted for pivot- 52 us. c1 ..49/251, 49/252, 49/417 s movsmem with"Spec! to the framccmral portions [51] Int. Cl ..E05d 15/44 of Bash arePivomuy mnneeied w jambs 95 [58] Field of Search ..49/181, 172, 174,176, 162, frame y arm, while the e ds of th sash stiles are pivolally49/451, 452, 250, 251, 252, 417 connected to shoes which ride in guidetracks on the frame jambs. Each shoe is constructed of a flexiblematerial and is [5 6] References Cited provided with a central openinghaving converging side walls. A wedge block having complementaryinclined sides is UNITED STATES PATENTS mounted within the opening. Astud is connected to the wedge 1,713,562 5/1929 Sibley ..49/251 X blockand by tightening down the stud, the wedge block is 1,760,072 5/1930 Lea..49/251 X moved within the opening in the shoe to force the sides ofthe 2,261,179 11/1941 Peremi et a1 shoe outwardly into engagement withthe guide track to in- 3,020,604 2/1962 Bransford ..49/251 crease h f ii l e i t e, 3,126,588 3/1964 Osten ..49/18l X 3,434,236 3/1969 Weidneret al ..49/181 X 4 Claims, 5 Drawing Figures FRICTION SHOE CONSTRUCTIONFOR A PIVOTING WINDOW The invention relates to a pivoting type window orclosure and more particularly to an improved frictionshoeconstructionfor use with a pivoting type window.

In a pivoting type window the sash ismounted to tilt or pivot in avertical direction with respect to the frame between the open and closedportions, In the conventional. pivoting type window the central portionsof the stiles of the sash are pivotally connected by arms to the jambsof the frame, and when the sash is in the closed position the arms areparallel to the jambs. In addition, the ends of the sash stiles arepivotally connected to shoes which ride within guide tracks in the framejambs as the sash is pivoted between the openand closedpositions. Whenthe sash is in the closed position. each shoe is located at the end ofthe respective track -anduas the sash is pivoted to the open position,the shoe will slide towards the central portion of the track.

In order to hold the sash at any desiredopen-position, a frictionmechanism is normally associatedwithone or both of these shoes, whichwill provide sufficient frictionalresistance between the shoe and theguide track to prevent free return of the sash by gravity to the closedposition. In the past, the friction mechanisms have taken various forms.However for the most part the friction mechanismsof the prior art havebeen difficult to adjust in that the location of. adjustment was in arelatively inaccessible location. Furthermore, in some situationsspecial tools were required to provide theadjustment.

As a further disadvantage,the conventional friction devices have reliedon spring pressure so that the frictional resistance was limited to thespring force. Therefore, withthe use of a spring it was not possibletoadjust the spring force to a, degree so that the sash would be locked orfrozen at a given position.

The present invention is directed to an improved friction shoeconstruction for a pivoting type of window or closure. According to theinvention the shoe is formed of a flexible plastic material and thecentral portion ofthe shoe is provided with agenerally trapezoidal shapeopening in which the sides of the opening converge toward eachother.Located within the opening is a wedge block havinginclined sidewallswhich complement the sides of the shoe bordering'the opening. A stud,which is parallel to the guide track, extends through the end of theshoe and is engaged with the wedge block. By threading down the stud,the wedge block will be moved within the opening to thereby deflectthesides ofthe shoe outwardly by a wedging type of action and increasethefrictional resistance of the sides of the shoe against the sidewallsofthe guide track.

The friction shoe construction of the invention is a simple andinexpensive construction in which the frictional resistance can bereadily varied by merely tightening or looseningthe stud attached to thewedge block. The head of the stud is in an accessible location and nospecial tools, other than a screwdriver, arerequired to varythe-frictional resistance.

As the frictional resistance is not dependent upon spring force, thefrictional resistance can be increased to a point where the shoe willlock or freeze to the guide track, thereby preventing movement ofthesash with respect to the frame. This feature is important whendealing with largerwindows containing insulating type glassfor the sashcan weigh 100 pounds or more. Thus it is desirableto beable to lockthesash in a given position for window washing operations and the like.

Other objects in advantage will appear in the course of the followingdescription.

The drawings illustrate the best mode presently contemplated of carryingout the invention.

In the drawings:

FIG. 1 is a perspective view of a pivotingtype window incorporating thefriction shoe of the invention. 7

FIG. 2 is a transverse section taken through the jamb of the frame andshowingthe sash in the closed position.

FIG. 3 is a fragmentary plan view showing the friction shoe.

FIG. 4 is an exploded view of the friction shoe, and

FIG. '5 is a fragmentary view showing the connection of the frictionshoe to the sash.

The drawings illustrate a window 1 which includes a frame 2 and a sash 3which is adapted to pivot with respect to the frame between an open andclosed position. The sash can be locked to-the frame by a conventionallocking mechanism actuated by the handle 4.

Each. jamb of the frame 2 defines a vertical guide track 5 which isbordered by the side membersp6 and 7 of the frame.

A pivot hinge mechanism, indicated generally by 8, is employed toconnect the sash 3 to the jambs of the frame 2. Each pivothingemechanism' 8 includes an arm 9 which is pivotally connected bypivot 10 to a bracket 11 mounted by screws 12 tothe track 5 of the framejamb. The opposite end of the arm 9 is connected to the central portionof the stile 13 of the sash by a pivot 14. When the sash is in theclosed position, the arm 9 will be located parallel to the track 5 andas the sash is pivoted to'the open position the arm will pivot to anangular position as shownin FIG. 1 and FIG. 3.

In addition to the pivot hinge mechanism, the ends of the sash stilesare pivotally connected to shoes 15 which are adapted to ride within thetracks 5. Apin 16 is journaled for rotation within an opening in eachshoe l5 and is received within a cylindrical channel 17 formed in theupper rail of the sash. Asshown in FIG. 6 a spring 18 bears against theend of the pin. and urges the shoe 15 towards the bottom of the track 5.A portion of the cylindrical channel 17 is bent inwardly as indicated by19 to retain'the spring 18 in position. The spring 18 functions duringassembly to maintain a shoe in the bottom of the track. Once the sash ofthe shoe has been assembled the spring 18 performs no function duringthe normal opening and closing of the sash.

As best illustrated in FIGS. 3 and 4, the shoe 15 is provided with acentralgenerally trapezoidal shaped opening 20 with the walls 21bordering the opening 20 converging towards each other. The shoe 15is-preferably formed of a relatively hard, yet flexible, plasticmaterial, such as nylon, which has self lubricating properties so thatit will slide smoothly within the track 5.

Mounted within the central opening 20 is a wedge block 22 having taperedsidewalls 23 which complement the tapered walls 21. To move the wedgeblock 22 within the opening 20, a stud 24 extends throughalignedopenings 25 and 26 in the shoe 15 and block 22, respectively, andengages a nut 27 located within a slot 28 in the block. The end of theshoe is provided with a recess 29 which receives the head 30 of the studso that the head does not protrude beyond the surface of the shoe.

By threading the stud 24 downwardly within the nut 28, the wedge block22 will be drawn towards the narrow end of the opening 20 to therebydeflect the sides 31 of the shoe outwardly and force. the sides 31 intotight bearing engagement with the side members 6 and 7 of the track. Theportion of the shoe extending between the surface 21 and the side 31 issufficiently thin so that the wedging action provided by the block 22can deflect or deform the side 31 outwardly into engagement with theside members 6 and 7 of the track.

The head 30 of the stud 24 faces downwardly toward the bracket 11 and isin a readily accessible position where it can be adjusted by means of ascrewdriver. By merely turning the adjusting stud or screw thefrictional resistance between the shoe 15. and the side members 6 and 7of the track can be conveniently varied as desired. As the frictionalresistance is not dependent on spring force, the stud 24 can betightened down to a degree such that the frictional resistance isincreased to a point where-the shoe 15 will lock against the sidemembers6 and 7 of the track to prevent any pivotal movement of the sash withrespect to the frame. This latter feature is of importance when dealingwith large, double glazed windows in which the sash can be ofsubstantial weight, for it is frequency desired to lock the sash in agiven position during window washing operations, repair or the like.

While the above description is directed to a window it is contemplatedthat the friction shoe construction can be used ticularly pointing outand distinctly claiming the subject 5 matter which is regarded as theinvention.

1 claim:

1. In a sliding pivot closure structure having a sash pivotable withrespect to a frame, a track formed in a jamb of the frame and includinga pair of parallel side members, a sliding shoe mounted for slidingmovement in the track, a shaft rotatably mounted in said shoe andconnected to said sash, said shoe being provided with a central openingwith the surfaces of the shoe bordering said opening converginglongitudinally of the direction of sliding movement of the shoe in saidtrack, a wedge block disposed within the opening and having convergingsidewalls to complement the converging surfaces of said shoe, andoperating means operably connected to said block for moving the blocklongitudinally within the opening with movement of said block towardsthe converging ends of said surfaces serving to deflect the sides of theshoe outwardly into tight bearing engagement with the side members ofthe track to thereby increase the frictional resistance between saidshoe and said side members.

2. The structure of claim 1, wherein said operating means comprises anoperating member extending through an opening in the shoe and engagedwith said block, said operating member extending longitudinally of saidtrack with an end of the operating member being exposed at the end ofthe shoe.

3. The structure of claim 2, wherein said wedge block is provided with aslot extending in a plane transverse to the direction of slidingmovement of the shoe, and said structure includes a nut located withinthe slot, said operating member comprising a stud threadedly engagedwith the nut.

4. The structure of claim 3, wherein the end of the shoe is providedwith a recess to receive the head of the stud.

1. In a sliding pivot closure structure having a sash pivotable withrespect to a frame, a track formed in a jamb of the frame and includinga pair of parallel side members, a sliding shoe mounted for slidingmovement in the track, a shaft rotatably mounted in said shoe andconnected to said sash, said shoe being provided with a central openingwith the surfaces of the shoe bordering said opening converginglongitudinally of the direction of sliding movement of the shoe in saidtrack, a wedge block disposed within the opening and having convergingsidewalls to complement the converging surfaces of said shoe, andoperating means operably connected to said block for moving the blocklongitudinally within the opening with movement of said block towardsthe converging ends of said surfaces serving to deflect the sides of theshoe outwardly into tight bearing engagement with the side members ofthe track to thereby increase the frictional resistance between saidshoe and said side members.
 2. The structure of claim 1, wherein saidoperating means comprises an operating member extending through anopening in the shoe and engaged with said block, said operating memberextending longitudinally of said track with an end of the operatingmember being exposed at the end of the shoe.
 3. The structure of claim2, wherein said wedge block is provided with a slot extending in a planetransverse to the direction of sliding movement of the shoe, and saidstructure includes a nut located within the slot, said operating membercomprising a stud threadedly engaged with the nut.
 4. The structure ofclaim 3, wherein the end of the shoe is provided with a recess toreceive the head of the stud.